Neutral atoms of a specific element can have different numbers of which of the following?

a.) protons

b.) neutrons

c.) electrons

d.) none of the above

Which best represents the law of conservation of mass ?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?